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Efflorescence

migration of a salt to the surface of a porous material
  • Primary Efflorescence in a Masonry Wall. This is only a cosmetic problem, not a structural issue.
    Primary Efflorescence in a Masonry Wall. This is only a cosmetic problem, not a structural issue.
  • Secondary efflorescence: Osteoporisis of the concrete.
    Secondary efflorescence: Osteoporisis of the concrete.
  • Secondary efflorescence. The red marks are rust (iron oxide) from rebar.
    Secondary efflorescence. The red marks are rust (iron oxide) from rebar.
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